From: Jeongjun Park <aha310510@xxxxxxxxx>
commit 35f56c554eb1b56b77b3cf197a6b00922d49033d upstream.
When tb[IPSET_ATTR_IP_TO] is not present but tb[IPSET_ATTR_CIDR] exists,
the values of ip and ip_to are slightly swapped. Therefore, the range check
for ip should be done later, but this part is missing and it seems that the
vulnerability occurs.
So we should add missing range checks and remove unnecessary range checks.
Cc: <stable@xxxxxxxxxxxxxxx>
Reported-by: syzbot+58c872f7790a4d2ac951@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 72205fc68bd1 ("netfilter: ipset: bitmap:ip set type support")
Signed-off-by: Jeongjun Park <aha310510@xxxxxxxxx>
Acked-by: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netfilter/ipset/ip_set_bitmap_ip.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/net/netfilter/ipset/ip_set_bitmap_ip.c
+++ b/net/netfilter/ipset/ip_set_bitmap_ip.c
@@ -163,11 +163,8 @@ bitmap_ip_uadt(struct ip_set *set, struc
ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
if (ret)
return ret;
- if (ip > ip_to) {
+ if (ip > ip_to)
swap(ip, ip_to);
- if (ip < map->first_ip)
- return -IPSET_ERR_BITMAP_RANGE;
- }
} else if (tb[IPSET_ATTR_CIDR]) {
u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
@@ -178,7 +175,7 @@ bitmap_ip_uadt(struct ip_set *set, struc
ip_to = ip;
}
- if (ip_to > map->last_ip)
+ if (ip < map->first_ip || ip_to > map->last_ip)
return -IPSET_ERR_BITMAP_RANGE;
for (; !before(ip_to, ip); ip += map->hosts) {
Patches currently in stable-queue which might be from aha310510@xxxxxxxxx are
queue-6.12/ext4-supress-data-race-warnings-in-ext4_free_inodes_-count-set.patch
queue-6.12/wifi-ath9k-add-range-check-for-conn_rsp_epid-in-htc_.patch
queue-6.12/usb-using-mutex-lock-and-supporting-o_nonblock-flag-.patch
queue-6.12/netfilter-ipset-add-missing-range-check-in-bitmap_ip_uadt.patch
